US2446037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective signaling system
Assignee: American Airlines Inc
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Filing: 1946-03-01
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Granted: 1948-07-27
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Expires: 1966-03-01
Abstract
No abstract record available.
Inventors
- 👤 Charles E Ammann
- 👤 Rodney W King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:27
CPC Classifications
G; G08; G08B; G08B5/00; G08B5/22; G08B5/221; G06; G06Q; G06Q10/00; G06Q10/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-27 | 1952-01-26 | 1952-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-27 | 1956-01-26 | 1956-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-27 | 1960-01-26 | 1960-07-27 | $7700.00 | Window Closed / Lapsed |